emitime

emiTime

The emiTime library is designed to simplify the work with objects describing calendar time points and intervals between them. All algorithms presented in the library are based on two entities Moment and Inerval. Each of them can be fired from anything that looks like a calendar time point or a time interval.

Installation

pip install emitime

Or from GitHub

git clone https://github.com/rilshok/emitime.git
cd emitime
pip install -e .

Usage

A Moment object can be created by a str, datetime module objects such as date and datetime, or another Moment. In turn, Interval can also be derived from a str, datetime.time or another Interval.

import datetime as dt

from emitime import Moment

d1 = Moment("1970-01-01")
d2 = Moment(dt.datetime(1970, 1, 1))
d3 = Moment(dt.date(1970, 1, 1))
d4 = Moment(d3)

print(f"{d1=}, {d2=}, {d3=}, {d4=}")
print(f"{d1 == d2 == d3 == d4 = }")

d1=1970-01-01, d2=1970-01-01, d3=1970-01-01, d4=1970-01-01
d1 == d2 == d3 == d4 = True

import datetime as dt

from emitime import Interval

t1 = Interval("2d")
t2 = Interval("12:00")
t3 = Interval(dt.timedelta(hours=5))
t4 = Interval(t3)

print(f"{t1=}, {t2=}, {t3=}, {t4=}")
print(f"{t1 > t2 > t3 >= t4 = }")

t1=+2^00:00, t2=+12:00, t3=+05:00, t4=+05:00
t1 > t2 > t3 >= t4 = True

Moment and Interval can participate in natural mathematical operations and be compared with each other. Also, whenever possible, depending on the context, emiTime promotes the type of one of the operands of the operation to Moment or Interval

import datetime as dt

from emitime import Interval, Moment

m1 = Moment("1970-01-01") + "2d"
m2 = dt.timedelta(hours=5) + Moment("01.01.1970")
m3 = "1970-01-01" + Interval("12:00")

i1 = Moment("2020-01-01") - "2019-01-01"
i2 = "12:00" - Interval("1d")
i3 = dt.date(2021, 1, 1) - Moment("2020-01-01")

print(f"{m1=}, {m2=}, {m3=}")
print(f"{i1=}, {i2=}, {i3=}")
print(f"{m1 > m2=}")
print(f"{m2 < m3 <= m1 =}")
print(f"{m3+i2 == m1 - i3+i1 - i3+i1 = }")

m1=1970-01-03, m2=1970-01-01d05:00, m3=1970-01-01d12:00
i1=+365^00:00, i2=-12:00, i3=+366^00:00
m1 > m2=True
m2 < m3 <= m1 =True
m3+i2 == m1 - i3+i1 - i3+i1 = True

Moment is based on the standard datetime.datetime and Interval is based on datetime.timedelta. Which can be accessed as follows.

from emitime import Interval, Moment

m = Moment("1970-01-01")
i = Interval("02:10")
mdt = m.datetime
itd = i.timedelta

print(f"{mdt = }")
print(f"{itd = }")

mdt = datetime.datetime(1970, 1, 1, 0, 0)
itd = datetime.timedelta(seconds=7800)

Emit and enjoy.